vice in assisting to pi'eserve these plants. He 
employed a good number of hands to gather the 
Grubs ; and under these circumstances he obtained 
a moderate crop of Teazles, while in most other 
parts the crop was very indifferent, and in many 
completely destroyed. But I can almost fancy I 
hear it asked, “ But if the Crows are to be encour- 
aged, and not at all interrupted in their increase, 
what is to be the consequence in seed-time and 
harvest ?” In reply I would recommend such in- 
quirers to use the same means which have long been 
practised, namely, employing boys to watch in the 
fields. Let thetn shout a few times more, and suffer 
them to use a few more chargings of powder, giving 
them strict charge to leave out the fatal shot, the 
expense of which being relinquished will probably 
defray the expense of the extra powder. The Farmer 
will find the tending of his Corn field of two-fold 
service, for while he is preserving his Corn he is 
forcing the Crows to procure support in those parts 
which are annoyed with Grubs, Worms, Beetles, 
&c., which, in all probability, might otherwise have 
done irremediable damage. 
FORCING OR GLASS-HOUSES. 
Aphides. — ’There are some species of the 
Aphides that are found to annoy various kinds 
of plants, protected by glass, especially some of 
